Sunday, 23 September 2012

Fractions Revision

Use your Mathletics booklet that we used in class to revise how fractions work. Jump onto the Mathletics website and do some more revision that way as well.

Then have a go at these problems. When you have finished, get someone at home to make up some similar problems for you.

Example:

You have 16 lollies in a bag. 1/4 are red. The rest are blue. How many blue lollies do you have?

Step 1: Read the question.

Step 2: List all of the key information you have from the problem.

- 16 lollies in total.
- 1/4 are red
- The rest are blue. (What fraction is that?)

Step 3: Figure out the missing information.

- If 1/4 are red and the rest are blue, then 3/4 must be blue.

Step 4: Write the maths equation that you are going to solve.

- 3/4 of 16 =?

Step 5: Solve the maths equation.

-  1/4 of 16 =>  16 divided by 4 = 4.
   So 3/4 => 4 x 3 = 12.

Step 6: Answer the question.

- There are 12 blue lollies.


Problems to try:

1. A farmer has 42 cows in a paddock. 3/7 are brown cows. The rest are black cows. How many black cows are in the paddock?

2. Sally orders 24 burgers at the fish 'n' chip shop. She orders 8 chicken burgers, the rest are fish burgers. What fraction are fish burgers?

3. Room 3 has 27 students. 6/9 are boys. How many girls are there?


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